Salifert Alkalinity Marine Test Kit

Salifert Alkalinity (KH) Marine Water Test Kit

Salifert Alkalinity Marine Test Kit is used to measure the alkalinity or carbonate hardness of marine water in small increments to help maintain stable pH levels for coral and calcareous algae growth.

Calcium alone cannot form the skeletal material of corals and allow calcareous algae to grow. Some other substances are needed as well. A few other constituents are carbonate and bicarbonate. These two substances also have a major impact on the stabilization of the
pH in the proper range of 8.1 – 8.4. Such stabilization is also called buffering.

The total carbonate and bicarbonate concentration is also called carbonate alkalinity or carbonate hardness. The only difference between alkalinity and carbonate hardness is a conversion factor.

NSW has an alkalinity of approx. 2.7 meq/L or approx. 7.5 dKH when expressed as carbonate hardness.

For a stable system, the alkalinity or carbonate hardness should have a value similar to NSW or slightly higher and should preferably not fluctuate by more than 5%. This means a maximum fluctuation of 0.14 meq/L or 0.4 dKH.

Therefore an alkalinity test kit should be capable of measuring in steps smaller than 0.14 meq/L.

Conclusion:

Since the major buffer components used for coral and calcareous algae growth are bicarbonate and carbonate, they should be added to correct any decrease in alkalinity or carbonate hardness.

A properly formulated buffer should function in such a way that the corrective measures result in a long-lasting effect and should not upset the pH of the system. The alkalinity or carbonate hardness should be kept as stable as possible requiring highly sensitive and accurate means for testing.

The Salifert KH/Alk test is very straightforward. It measures in sufficient small steps of 0.1 meq/L or 0.3 dKH with a sharp color change. This makes the detection of important yet small changes possible.

The kit can perform approx. 100 - 200 measurements

When can I expect delivery?

• Gauteng (Jhb/Pta) - 1-3 working days
• Nationwide (Cpt/Dbn+) - 2-5 working days
• Outlying Areas - 3-7 working days

All orders are sent via Economy Road, typically through Fastway or Internet Express Couriers*. Estimated timeframes are not guaranteed. Once the order is collected by the courier, we have no control over third-party logistics and cannot make any time promises.

If you prefer a faster 🚀 shipping option, we also offer The Courier Guy during checkout in the dropdown selection. Please note that this option is not free, and you must choose it to use it. Please pay careful attention to the cutoff times and delivery timeframe for these options during checkout.

Enjoy the convenience of collection points and lockers! 📦

No more waiting at home or at work for your delivery. Simply choose a collection locker or pickup point and collect your order when it suits you.

Delivery times to lockers and pickup locations typically range from 2–7 working days, depending on your location.*

Collection timeframes:

• Bob Box: Collect within 2 days of receiving your collection notification.
• PUDO Lockers: Collect within 36 hours of receiving your collection PIN or SMS notification.
• Pargo Pickup Points: Collect within 5 days of arrival at the pickup location.

If a PUDO parcel is not collected within 36 hours, it will automatically be transferred to the nearest PUDO Kiosk or Depot at no additional cost. The parcel will then be held there for approximately 14 days before being returned.

Please ensure you collect your parcel within the applicable collection period. Uncollected parcels will be returned to the sender, and additional shipping charges may apply should the order need to be resent.